Abstract:
:The retention of photosystems I and II and or RuDP carboxylase activity in chloroplasts isolated from the first leaves of Victory oat (Avena sativa L.) seedlings was followed as the chloroplasts senesced in darkness. Both photosystems (PS) I and II retained their full activity after 3 days at 1°C, while even after 7 days at 1°C around 80% of the activity was still present. After 3 days at 25°C, PS I lost only 20% and PS II 50% of the initial activity. Acid pH increased the rate of decay of both systems, PS II falling almost to zero after 3 days at pH 3.5 (at 25°C). The preparations were almost bacteria-free, and addition of antibiotics not only did not improve their stability, but accelerated the rates of loss of photosynthetic activity. This is held to indicate that the enzymes are undergoing some turnover even in isolated chloroplasts. If the leaves were allowed to senesce in the dark first and the chloroplasts then isolated, their photosynthetic activities had greatly decreased, showing that senescence is more rapid in situ than in isolation. Under these conditions PS I decayed more rapidly than PS II. Ribulosediphosphate carboxylase, as measured by CO2 fixation, declined more rapidly than the photosystems, though the addition of kinetin and indole-3-acetic acid somewhat decreased the rate of loss, at least for the first 24 h. When the intact (detached) leaves were held in the dark, the rate of oxygen evolution declined rapidly, but in monochromatic blue light (450 nm) at 25°C about 30% of the initial rate was retained after 72 h.
journal_name
Plantajournal_title
Plantaauthors
Choe HT,Thimann KVdoi
10.1007/BF00387157subject
Has Abstractpub_date
1977-01-01 00:00:00pages
101-7issue
2eissn
0032-0935issn
1432-2048journal_volume
135pub_type
杂志文章相关文献
PLANTA文献大全abstract:MAIN CONCLUSION:The present review discusses not only advances in coconut tissue culture and associated biotechnological interventions but also future research directions toward the resilience of this important palm crop. Coconut (Cocos nucifera L.) is commonly known as the 'tree of life'. Every component of the palm c...
journal_title:Planta
pub_type: 杂志文章,评审
doi:10.1007/s00425-015-2362-9
更新日期:2015-11-01 00:00:00
abstract::Fungal mycelium of the fly agaric (Amanita muscaria [L. ex Fr.] Hooker), and inoculated or noninoculated seedlings of Norway spruce (Picea abies [L.] Karst.) were grown aseptically under controlled conditions. In order to detect symbiosis-specific polypeptides ('ectomycorrhizins', see Hubert and Martin, 1988, New Phyt...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF01160722
更新日期:1992-03-01 00:00:00
abstract::Detached phyllodia ofBryophyllum tubiflorum were fed under illumination with(14)CO2 at different times during the light/dark period (12:12 hours). After photosynthesis in presence of(14)CO2 during the intrinsic dark period the greatest part of soluble radioactivity was found in malate. When the same experiment was rep...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF01391117
更新日期:1969-06-01 00:00:00
abstract::Polysomes in sieve elements of rice (Oryza sativa L.) were studied with the electron microscope. The polysomes were found on the rough endoplasmic reticulum (ER) present in immature sieve elements and also on the cisternae of aggregated ER in the parietal layer of mature, enucleate sieve elements. In the immature siev...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00390834
更新日期:1980-11-01 00:00:00
abstract::Leaves ofNerium oleander L. plants, which had been previously kept in a shaded glasshouse for at least two months, were fed 1 mM dithiothreitol (DTT) through their petioles, either for 12h in darkness (overnight) or for 2h in low light (28 μmol photons·m(-2)·s(-1)), in each case followed by a 3-h exposure to high ligh...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF02411406
更新日期:1989-12-01 00:00:00
abstract::1. In Scenedesmus acutus Tomaselli, endogenous variations in cell progeny production and chlorophyll formation have been found which are very similar to those previously described in Chlorella by Hesse (Z. Pflanzenphysiol. 67, 58-77, 1972). When the dark phase of the light-dark-cycle is prolonged to a certain extent, ...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00388684
更新日期:1975-01-01 00:00:00
abstract::Phytochrome, activated by continuous red light, increases the amount of total polyadenylated RNA during photomorphogenesis of mustard (Sinapis alba L.) cotyledons. In-vitro translation of total polyadenylated RNA in a reticulocyte translation system has shown that the activity of translatable β-amylase mRNA is increas...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00398676
更新日期:1987-07-01 00:00:00
abstract:MAIN CONCLUSION:Formation of specific ultrastructural chromoplastidal elements during ripening of fruits of three different colored Physalis spp. is closely related to their distinct carotenoid profiles. The accumulation of color-determining carotenoids within the chromoplasts of ripening yellow, orange, and red fruit ...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-020-03383-5
更新日期:2020-04-09 00:00:00
abstract::Nitrate-induced and phytochrome-modulated appearance of nitrate reductase (NR; EC 1.6.6.1) and nitrite reductase (NIR; EC 1.7.7.1) in the cotyledons of the mustard (Sinapis alba L.) seedling is strongly affected by externally supplied ammonium (NH 4 (+) ). In short-term experiments between 60 and 78 h after sowing it ...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00392112
更新日期:1986-12-01 00:00:00
abstract::The aim of this work was to test the hypothesis that endogenous ascorbate, released into the apoplast by membrane permeabilisation early in fruit ripening, could promote the solubilisation and depolymerisation of polysaccharides, and thus contribute to fruit softening. In vitro, ascorbate (1 mM), especially in the pre...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-003-1061-0
更新日期:2003-10-01 00:00:00
abstract::Mycorrhizal colonization of genetically modified hybrid aspen (Populus tremula x P. tremuloides Michx.) was investigated over 15 months in a field experiment. The aspen carried the rolC gene from Agrobacterium rhizogenes under control of either the constitutive cauliflower mosaic virus 35S promoter or the light-induci...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s004250100658
更新日期:2002-02-01 00:00:00
abstract:MAIN CONCLUSION:Specific α- l -arabinofuranosidases are involved in the realisation of elongation growth process in cells with type II cell walls. Elongation growth in a plant cell is largely based on modification of the cell wall. In type II cell walls, the Ara/Xyl ratio is known to decrease during elongation due to t...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-015-2244-1
更新日期:2015-05-01 00:00:00
abstract::The uptake and conversion of NO 2 (-) and the effect of NO 2 (-) on the uptake and reduction of NO 3 (-) were examined in N-depleted Phaseolus vulgaris L. Nitrite uptake at 0.1 mmol dm(-3) was against an electrochemical gradient and became constant after one or two initial phases. Steadystate uptake declined with incr...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00393729
更新日期:1982-12-01 00:00:00
abstract::The dynamics of microtubule (MT) disassembly and reassembly were studied in the green alga Ernodesmis verticillata, using indirect immunofluorescent localization of tubulin. This alga possesses two distinct MT arrays: highly-ordered, longitudinally-oriented cortical MTs, and shorter perinuclear MTs radiating from nucl...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00202952
更新日期:1991-11-01 00:00:00
abstract::The fixation pattern of radioactive labelled photosynthetic intermediates was followed under steady state conditions during prolonged dark starvation of spinach plants (Spinacia oleracea L.). It is suggested that the considerable increase of radioactive dihydroxyacetonephosphate is correlated with a specific leakage o...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00384755
更新日期:1975-01-01 00:00:00
abstract::Etiolated maize leaves (Zea mays L.) contain a major isozyme of NADP-dependent malic enzyme (L-malate dehydrogenase, decarboxylating, EC 1.1.1.40) having an isoelectric point of 5.28±0.03, a Km (L-malate) 0.3-0.6 mM at pH 7.45; a broad pH optimum around pH 6.9 under the conditions of assay; a molecular weight of 280,0...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00388771
更新日期:1979-01-01 00:00:00
abstract:MAIN CONCLUSION:PtrGH9A7, a poplar β-type endo-1,4-β-glucanase gene induced by auxin, promotes both plant growth and lateral root development by enhancing cell expansion. Endo-1,4-β-glucanase (EGase) family genes function in multiple aspects of plant growth and development. Our previous study found that PtrCel9A6, a po...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-018-2851-8
更新日期:2018-05-01 00:00:00
abstract::Water potential, osmotic potential and turgor measurements obtained by using a cell pressure probe together with a nanoliter osmometer were compared with measurements obtained with an isopiestic psychrometer. Both types of measurements were conducted in the mature region of Tradescantia virginiana L. leaves under non-...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00392152
更新日期:1989-01-01 00:00:00
abstract::A pine asparagine synthetase gene expressed in developing seedlings has been identified by cloning its cDNA (PsAS1) from Scots pine (Pinus sylvestris L.). Genomic DNA analysis with PsAS1 probes and a sequence-based phylogenetic tree are consistent with the possibility of more than one gene encoding asparagine syntheta...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-005-0196-6
更新日期:2006-06-01 00:00:00
abstract::The recent introduction of (31)P nuclear magnetic resonance spectroscopy offers a new approach to the problem of obtaining a simultaneous and direct evaluation of both the cytoplasmic and vacuolar pH in higher plant cells (J. K. M. Roberts, P.M. Ray, N. Waderlardetzky and O. Sardetzky, 1980, Nature 283, 870-872; 1981,...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00392784
更新日期:1982-01-01 00:00:00
abstract::Changes in the uronide, neutral-polysacharide, and cellulose composition of the cell wall ofNitella axillaris Braun were followed throughout development of the internodes and correlated with changes in growth rate. As the cells increased in length from 4 to 80 mm during development, the relative growth rate decreased....
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF01607568
更新日期:1982-11-01 00:00:00
abstract::A study has been made of plastids in the root meristem of Colchicum autumnale. These organelles contain simultaneously deposits of starch, lipid, and a crystalline material, probably protein. Two types of internal membrane are present within the plastid. One appears to be concerned with the transport of material acros...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00389294
更新日期:1969-03-01 00:00:00
abstract::The unistratose thallus of the gemmaling of Riella helicophylla is divided into an apical growth lobe with the meristem, an intermediate pillar, and a basal rhizoidal lobe. This organization can be correlated with a distinct fluorescence pattern of wall and membrane after treatment with chlorotetracycline. Mature cell...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00397238
更新日期:1983-08-01 00:00:00
abstract::The kinetics and localization of Rb(+) uptake by barley roots were studied as function of the water potential of the medium. At potentials causing plasmolysis, uptake is reduced and becomes restricted to the outer surface of the root. The conclusion is that, at least for Rb(+) in the range of low external concentratio...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00386413
更新日期:1980-03-01 00:00:00
abstract::In order to elucidate the involvement of brassinosteroids in the cell elongation process leading to normal plant morphology, indirect immunofluorescence and molecular techniques were use to study the expression of tubulin genes in the bul1-1 dwarf mutant of Arabidopsis thaliana (L.) Heynh., the characteristics of whic...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s004250000467
更新日期:2001-04-01 00:00:00
abstract::Excised wheat (Triticum aestivum L.) and field pea (Pisum arvense L.) roots, incubated under anaerobic conditions or in the presence of uncouplers of oxidative phosphorylation [2,4-dinitrophenol (DNP), carbonylcyanide-m-chlorophenylhydrazone, pentachlorophenol] accumulated nitrite as a result of an inhibition of nitri...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00385149
更新日期:1981-07-01 00:00:00
abstract::1,2,3,4-tetra-O-acetyl-6-ethyladipate-beta- D-glucopyranose (TOGE), a glycoside derivative of adipic acid monoethyl ester and 1,2,3,4-tetra-O-acetyl-beta- D-glucopyranose, was synthesized and the resistance-inducing activity shown by TOGE-1 (TOGE plus furfurylamine) and TOGE-2 (TOGE plus 1,3-diaminepropane) was assaye...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-002-0945-8
更新日期:2003-04-01 00:00:00
abstract::Using a model based on spectrophotometric measurements of the phytochrome of Sinapis alba L. seedlings we have used the published rate constants for the component reactions of this system to calculate the behaviour of the far-red absorbing form of phytochrome (Pfr), and other parameters, over a period of continuous ir...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/BF00392073
更新日期:1983-11-01 00:00:00
abstract::Single cell sap sampling and analysis were used to measure the longitudinal and radial distribution of sucrose, glucose and fructose in the apical cell division zone and in the basal, elongated zone of the Ricinus hypocotyl. Sucrose and hexose increased in concentration from the apex to the base of the seedling axis. ...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-006-0309-x
更新日期:2006-11-01 00:00:00
abstract:MAIN CONCLUSION:Our study demonstrated that symplasmic communication between Sedum acre seed compartments and the embryo proper is not uniform. The presence of plasmodesmata (PD) constitutes the structural basis for information exchange between cells, and symplasmic communication is involved in the regulation of cell d...
journal_title:Planta
pub_type: 杂志文章
doi:10.1007/s00425-016-2619-y
更新日期:2017-03-01 00:00:00